Understanding async/await in Node.js

🚀 I Finally Understood the Node.js Event Loop And it made Node.js make so much more sense. Most developers use Node.js daily. But very few understand what happens behind the scenes. Here are 3 things I learned today 👇 🔹 1. Node.js Uses libuv libuv powers the event loop and handles async tasks like: • File operations • Network requests • Timers This is why Node.js is non-blocking and scalable. 🔹 2. Before the Event Loop Starts Node.js first: • Initializes the environment • Executes top-level code • Loads modules (require / import) • Registers callbacks Only then does the event loop begin. 🔹 3. Event Loop Phases Once running, Node.js processes tasks in phases: 1️⃣ Timers 2️⃣ I/O callbacks 3️⃣ Polling 4️⃣ setImmediate 5️⃣ Close callbacks Understanding this helps write better async code. Big thanks to Hitesh Choudhary, Piyush Garg, Jay Kadlag for the amazing explanation. #NodeJS #JavaScript #BackendDevelopment #WebDevelopment

Today's chai code class was about node js internals We learned a bit about how Node.js works behind the scenes, but it was a lot to grasp! 1. Event Loop: How Node.js handles tasks one by one 2. Async behavior: Lets apps run fast without getting stuck 3. Timers & callbacks: Basics of how things happen in order  I’ll be learning more and sharing a detailed post on Node.js internals soon! Thanks to our teacher Piyush Garg for guiding us through this complex topic! #NodeJS #JavaScript #LearningJourney #BackendDevelopment #TechLearning #chaicode Hitesh Choudhary Anirudh J.Akash Kadlag

🚀 Why Node.js is So Fast? Let’s Understand the Secret Node.js is an open-source, cross-platform JavaScript runtime environment that allows developers to run JavaScript outside the browser, mainly on the server side. Asynchronous, Non-Blocking I/O High Performance – Powered by V8 engine 🔥 Top Node.js Questions Every Developer Should Know 🚀 1️⃣What is Event Loop in Node.js? 2️⃣ process.nextTick() vs setImmediate()? 3️⃣ What is Non-Blocking I/O? 4️⃣ How does Node.js handle concurrency? 5️⃣ What are Streams and their types? 6️⃣ How does the Node.js architecture work? 7️⃣ What is V8 engine’s role in Node.js? 8️⃣ What is libuv? 9️⃣ How does async/await work internally? 🔟 Callbacks vs Promises vs Async/Await 1)How does Garbage Collection work in Node.js? 2️⃣ How to detect memory leaks? 3️⃣ How to optimize Node.js performance? 4️⃣ What is EventEmitter? 5️⃣ How to avoid blocking the event loop? 6️⃣ Worker Threads vs Cluster Module 7️⃣ require() vs import() 8️⃣ CommonJS vs ES Modules 9️⃣ How does module caching work? How environment variables are managed? #NodeJS #JavaScript #BackendDeveloper #MERNStack #InterviewPreparation #WebDeveloper #Coding #TechJobs #FullStackDeveloper

🚀 One of the reasons Node.js is so powerful is its event loop. Instead of creating a new thread for every request, Node.js uses a non-blocking event loop to handle thousands of operations efficiently. This is why Node.js performs so well for APIs and real-time applications. Understanding how the event loop works can help you write more efficient backend code. I made a quick breakdown in this carousel 👇 Did the event loop confuse you when you first learned Node.js? #nodejs #backend #javascript #webdevelopment

🚀 Node.js: require vs import — What’s the Difference? When working with Node.js, understanding how modules are loaded can make a big difference in performance, readability, and scalability. 🔹 require (CommonJS) Synchronous (blocking) loading Loads the entire module Great for traditional Node.js projects Simple and widely supported 🔹 import (ES Modules) Supports asynchronous (non-blocking) loading Allows selective imports (e.g., only the functions you need) Enables better tree-shaking and optimization Modern, standardized JavaScript approach 💡 While require loads the whole module even if you only need one function, import can selectively load specific exports — helping with cleaner and more optimized code. As Node.js continues to evolve, ES Modules are becoming the preferred standard. Understanding both helps you write more efficient and future-proof applications. What’s your go-to: require or import? 👇 #NodeJS #JavaScript #WebDevelopment #BackendDevelopment #FullStack #Programming #Server #FrontendDevelopment #SoftwareDevelopment #CodingLife #RohitPatel

🚀 Getting Smart with Logs - A Practical Guide to Winston in Node.js Logging isn’t just console.log() anymore. In real-world applications, structured logging can make or break your debugging, monitoring, and production stability. In this guide, I’ve explored how to use Winston in Node.js to: ✅ Create structured logs ✅ Manage multiple log levels ✅ Store logs in files ✅ Handle errors effectively ✅ Improve production observability If you're building backend systems, understanding proper logging is not optional it’s foundational. Would love to know - what logging strategy are you using in your Node.js projects? 👇 #NodeJS #BackendDevelopment #JavaScript #Winston #WebDevelopment #FullStackDeveloper #SoftwareEngineering #CodingLife #Developers #Tech #SheryiansCodingSchool

Just created an Express.js Cheat Sheet! A simple and practical reference guide to quickly understand and work with Express.js while building Node.js applications. 📌 Topics Covered: • Setup • Routing • Middleware Perfect for beginners learning backend development and developers who want a quick revision guide. live: (https://lnkd.in/djsg-mnF) Code smarter. Build faster. 💻✨ #ExpressJS #NodeJS #JavaScript #BackendDevelopment #WebDevelopment #Coding #CheatSheet

Today’s session by Piyush Garg sir was a deep dive into Node.js Internals 🔍 Instead of just writing code, we explored what actually happens behind the scenes in Node.js. Key things I learned: • How the Event Loop works • The role of libuv in handling async operations • How Node.js manages non-blocking tasks efficiently Understanding these fundamentals makes backend development much clearer. Excited to keep exploring the internals of Node.js! #NodeJS #BackendDevelopment #WebDevelopment #JavaScript #ChaiCode Hitesh Choudhary, Chai Aur Code, Akash Kadlag, Jay Kadlag,

💡 Node.js Tip: Handle Async Errors Properly One mistake many developers make in Node.js APIs is not handling async errors correctly. Instead of writing this in every controller: ❌ try/catch everywhere It quickly makes the code messy and hard to maintain. A better approach is to create an async error handler wrapper. Example: const asyncHandler = (fn) => (req, res, next) => Promise.resolve(fn(req, res, next)).catch(next); Now you can write cleaner controllers: const getUsers = asyncHandler(async (req, res) => { const users = await userService.getUsers(); res.json(users); }); ✅ Cleaner controllers ✅ Centralized error handling ✅ Easier debugging Small improvements like this make a big difference in production APIs. How do you handle errors in your Node.js applications? #NodeJS #BackendDevelopment #JavaScript #WebDevelopment #Coding

Understanding the Node.js Workflow 🚀 From Client Request to Event Loop and Async Processing — this diagram helped me visualize how Node.js handles non-blocking operations efficiently. Always learning, always building. 💻 #NodeJS #JavaScript #BackendDevelopment #WebDevelopment #Learning